Four-way cock.



No. 717,899, I PATENTED JANLG, 1.903..

- P. McDONALD.

FOUR-WAY 000K.

APPLIOATION FILIEI) JULY 10, 1902;

H0 MODEL.

" myEn ro wr russszs' UNITED STATES PATENT OFFICE.

PATRICK MCDONALD, OF LARIMER, PENNSYLVANIA.

FOUR-WAY COCK.

SPEGIFIGATION forming part of Letters Patent No. 717,899, dated January6, 1903.

Application filed July 10, 1902.

To all whom it may concern.-

Be it known that I, PATRICK MCDONALD, a citizen of the United States ofAmerica, residing at Larimer, in the county of Westmoreland and State ofPennsylvania, have invented certain new and useful Improvements inFour-Way Cocks; and I do hereby declare the following to be a full,clear, and exact de scription thereof, reference being had to theaccompanying drawings, which form a part of this specification. a

This invention relates to certain new and useful improvements in fourway cocks adapted for use in connection with 'an airbrake train-line.

In the accompanying drawings I have illustrated my improved four-waycock, in which drawings- Figure 1 is a plan view of my four-way cock.Fig. 2 is a side view. Fig. 3 is a sectional view on line X X of Fig. 1.Fig. 4 is a sectional view on line 5 5 of Fig. 2. Fig. 5 is a Viewshowing the application of the invention to a train-line, and Fig. 6represents diagrams showing the various service positions. I

In the drawings the numeral 1 designates the shell or casing having atapered opening 2 therethrough and air-passages or parts 3 and 4communicating with the said opening and train-line connections or ends 5and a similar part 6 communicating with said opening and triple-valveend '7. A tapered plug-valve 8 is fitted into the tapered opening of theeasing and is held in position by a spring 9 and cap 10. The plug-valveis provided with a side or cut-away part 11, straight-away part 12, andpart 13 branching from said straightaway part, which parts are adaptedtoregister with the parts in the casing and with the dead-air parts 14. Atthe upper end of the casing is found four stop-notches l5, and to thetop of the plug is attached a hand1e l6,

which is provided with a spring-catch 17 to engage said stop-notches.Said spring and notches serve to indicate the position and retain thecock in such position.

In practice the train-line is connected to the ends 5 and the pipeleading to the triple Serial No. 115,008. (No model.)

valve to the end 7. If it is desired to let air from the train-line onthe left to the triple valve, the cock is turned into position shown atFigs. 1, 2, 3, or 4 and at B of Fig. 6. To let airfrom the train-lineinto triple valve at right, the cock is turned one quarter, as at C,Fig. 6. From both cars to triple the cock is as at D, Fig. 6, and forstraight-away train-line as at A, Fig. 6, the stop-spring 17 and notches15 holding the cock at any position to which the same may be turned.

This device does away with several independent cocks on the train-line,and the dead air remaining in the parts escapes out of parts 14.

By the expansion dead air it will be understood is meant the air whichremains in the pipes under pressure and which it is desired to releasewhen the air is not required for service, and which air is released toremove the pressure from the parts of the cock and connected mechanism.

Having fully shown and described my invention, whatI claim as new, anddesire to secure by Letters Patent, is-

1. In combination with a train-line, the four-way cock or valve, havingexhaust-openings, a plug in said valve having openings adapted toregister with the openings of the valve and with the exhaust, and meansfor holding the plug in proper position.

2. The combination with a train line and connection to the triple valve,of a four-way cock adapted to operate as set forth, means to relieve'theparts of dead air and means to indicate and retain said cock in any ofits operative positions, as shown and set forth.

3. In a four-way cook the shell 1, having the tapered opening 2;air-passages 3, 4 and 6; dead-air passages 14; cap 10, having a seat fora spring, substantially as described and shown.

In testimony whereof I have hereunto affixed my signature in thepresence of two subscribing witnesses.

PATRICK MCDONALD.

Witnesses:

W. E. WILSON, THOMAS KERNAN.

